ICP-OES法测定金属催化剂中7种元素

Determination of seven elements in metal catalyst by ICP-OES

使用马弗炉高温熔融金属催化剂,在酸性溶液中溶解,结合动态背景校正技术,在选定的最佳分析谱图和仪器合适的工作条件下,使用电感耦合等离子体原子发射光谱法(ICP-OES)同时测定铁、钴、镍、铬、镁、铝、硅,从而建立了ICP-OES同时测定金属催化剂中7种元素的分析方法。各元素线性范围内,校准曲线的线性相关系数均在0.999以上;方法中各元素检出限为0.001～0.010 mg/L。实验方法用于测定金属催化剂样品中铁、钴、镍、铬、镁、铝、硅,结果的相对标准偏差(RSD,n=5)均<2%,加标回收率在92%～98%之间。该方法准确可靠,重复性高,适合于金属催化剂中各元素的测定。

An analytical method for the simultaneous determination of seven elements which are iron,cobalt,nickel,chromium,magnesium,aluminum,silicon in metal catalysts by Inductively coupled plasma atomic emission spectrometry(ICP-OES)has been established.In the measurement process,metal catalysts were molten at high temperature in muffle furnace,and dissolved in acid solution,the seven elements were determined in the selected optimal analytical spectra and suitable instrument operating conditions,and combined with dynamic background correction technology.Within the linear range of all elements,the linear correlation coefficient of the calibration curve are above 0.999.The detection limits of seven elements in the method are 0.001-0.010 mg/L.The relative standard deviations(RSD)are less than 2%(n=5)and the recoveries are in the range of 92%-98%.The method is accurate,reliable and of high repeatability.